- All sections
- H - Electricity
- H04N - Pictorial communication, e.g. television
- H04N 21/441 - Acquiring end-user identification
Patent holdings for IPC class H04N 21/441
Total number of patents in this class: 374
10-year publication summary
|
76
|
53
|
35
|
45
|
32
|
34
|
27
|
23
|
19
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rovi Guides, Inc. | 3236 |
23 |
| Multimedia Technologies Pte, Ltd | 60 |
20 |
| Turner Broadcasting System, Inc. | 276 |
18 |
| LG Electronics Inc. | 69257 |
15 |
| AT&T Intellectual Property I, L.P. | 9886 |
14 |
| Universal Electronics Inc. | 687 |
11 |
| Samsung Electronics Co., Ltd. | 131630 |
9 |
| Apple Inc. | 50209 |
9 |
| Sony Corporation | 32931 |
9 |
| Google LLC | 38759 |
9 |
| Comcast Cable Communications, LLC | 4075 |
7 |
| Nagravision S.A. | 626 |
7 |
| Maxell, Ltd. | 2533 |
6 |
| Hisense Visual Technology Co., Ltd. | 725 |
6 |
| ARRIS Enterprises LLC | 3432 |
5 |
| Genetec Inc. | 257 |
5 |
| OpenTV, Inc. | 346 |
5 |
| Maxell Holdings, Ltd. | 1422 |
5 |
| The Nielsen Company (US), LLC | 2549 |
4 |
| Roku, Inc. | 1151 |
4 |
| Other owners | 183 |